实现checkbox的全选和取消

如果点击全选就把所有选项全选上,这个我们常用。。。

View Code
 1 <script type="text/javascript">
 2     /*实现checkbox的全选和取消*/
 3     function selectAll(dom){
 4      var a = document.getElementsByName("select");
 5         if(dom.checked){
 6             for(i=0;i<a.length;i++){
 7                 a[i].checked = true;
 8             }
 9         }else{
10             for(i=0;i<a.length;i++){
11                 a[i].checked = false;
12             }
13         }
14     }
15 <body>
16  <fieldSet>
17   <legend style = "margin-left : 500px">个人爱好</legend>
18   <input type= "checkbox" onchange = "selectAll(this)"/>全选</br>
19   <input type = "checkbox" name = "select"/>苹果
20   <input type = "checkbox" name = "select"/>逛街
21   <input type = "checkbox" name = "select"/>跑步
22   <input type = "checkbox" name = "select"/>郊游
23   <input type = "checkbox" name = "select"/>葡萄
24   <input type = "checkbox" name = "select"/>哈密瓜
25 
26  </fieldSet>

大家可以练习一下...

posted @ 2012-08-04 16:16  妍珊  阅读(466)  评论(0编辑  收藏  举报